3. The genetic code is commaless, which means that no codon is reserved for punctuations. It means that after one amino acid is coded, the second amino acid will be automatically, coded by the next three letters and that no letters are wasted as the punctuation marks (Fig.
Summer solstice is the first day of summer - it's usually between June 20th and June 23rd. In 2016, the summer solstice takes place on June 20th. We know it's summer because the earth's axis tilts toward the sun from June to September - this means warmer weather and longer days.
This year, it falls on June 21. But that's not always true. The summer solstice happens between June 20 and June 21 every year and formally occurs when the sun reaches its highest point in the sky. This year, the actual time the summer solstice begins is 12:38 p.m., Mental Floss reported. The sun will be over the Tropic of Cancer -- 23 degrees, 27 minutes north latitude. It will be in the sky from 5:25 a.m. to 8:31 p.m. EDT.